Intermediate structural state in Bi1−xPrxFeO3 ceramics at the rhombohedral–orthorhombic phase boundary

Crystal structure of the Bi1−xPrxFeO3 ceramics of the compositions corresponding to the threshold concentrations separating the polar rhombohedral (R3c) and anti-polar orthorhombic (Pbam) phases has been investigated with X-ray diffraction, transmission electron microscopy and differential scanning...

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Bibliographic Details
Main Author: Karpinsky D.V. (author)
Other Authors: Troyanchuk, I. O. (author), Willinger, M. (author), Khomchenko, V. A. (author), Salak, A. N. (author), Sikolenko, V. (author), Silibin, M. V. (author)
Format: article
Language:eng
Published: 2019
Online Access:http://hdl.handle.net/10773/25398
Country:Portugal
Oai:oai:ria.ua.pt:10773/25398
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Summary:Crystal structure of the Bi1−xPrxFeO3 ceramics of the compositions corresponding to the threshold concentrations separating the polar rhombohedral (R3c) and anti-polar orthorhombic (Pbam) phases has been investigated with X-ray diffraction, transmission electron microscopy and differential scanning calorimetry measurements performed in a broad temperature range. The structural study specifies the peculiarities of the temperature-driven transition into the non-polar orthorhombic (Pnma) phase depending on the structural state of the compounds at room temperature. The crystal structure analysis reveals the revival of the anti-polar orthorhombic phase upon the temperature-induced transition, thus assuming that it can be considered as the bridge phase between the polar rhombohedral and the non-polar orthorhombic phases.

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